The main question is whether or not the Haskell compiler (GHC) runs on
your platform.

A ``platform'' is a architecture/manufacturer/operating-system
combination, such as sparc-sun-solaris2. Other common ones are
alpha-dec-osf2, hppa1.1-hp-hpux9, i386-unknown-linux,
i386-unknown-solaris2, i386-unknown-freebsd,
i386-unknown-cygwin32, m68k-sun-sunos4, mips-sgi-irix5,
sparc-sun-sunos4, sparc-sun-solaris2, powerpc-ibm-aix.

Bear in mind that certain ``bundles'', e.g. parallel Haskell, may not
work on all machines for which basic Haskell compiling is supported.

Some libraries may only work on a limited number of platforms; for
example, a sockets library is of no use unless the operating system
supports the underlying BSDisms.

The GHC hierarchy of Porting Goodness: (a) Best is a native-code
generator; (b) next best is a ``registerised''
port; (c) the bare minimum is an ``unregisterised'' port.
(``Unregisterised'' is so terrible that we won't say more about it).

We use Sparcs running Solaris 2.7 and x86 boxes running FreeBSD and
Linux, so those are the best supported platforms, unsurprisingly.

Here's everything that's known about GHC ports. We identify platforms
by their ``canonical'' CPU/Manufacturer/OS triple.

alpha-dec-{osf,linux,freebsd,openbsd,netbsd}:

Currently non-working. The last working version (osf[1-3]) is GHC
3.02. A small amount of porting effort will be required to get Alpha
support into GHC 4.xx, but we don't have easy access to machines right
now, and there hasn't been a massive demand for support, so Alphas
remain unsupported for the time being. Please get in touch if you
either need Alpha support and/or can provide access to boxes.

sparc-sun-sunos4:

Probably works with minor tweaks, hasn't been tested for a while.

sparc-sun-solaris2:

Fully supported, including native-code generator.

hppa1.1-hp-hpux (HP-PA boxes running HPUX 9.x)

Works registerised. No native-code generator.

i386-unknown-linux (PCs running Linux—ELF binary format):

GHC works registerised, has a native code generator. You
must have GCC 2.7.x or later. NOTE about
glibc versions: GHC binaries built on a system
running glibc 2.0 won't work on a system running
glibc 2.1, and vice versa. In general, don't
expect compatibility between glibc versions, even
if the shared library version hasn't changed.

Port currently doesn't work, needs some minimal porting effort. As
usual, we don't have access to machines and there hasn't been an
overwhelming demand for this port, but feel free to get in touch.

powerpc-ibm-aix:

Port currently doesn't work, needs some minimal porting effort. As
usual, we don't have access to machines and there hasn't been an
overwhelming demand for this port, but feel free to get in touch.

Various other systems have had GHC ported to them in the distant past,
including various Motorola 68k boxes. The 68k support still remains,
but porting to one of these systems will certainly be a non-trivial
task.